CN104973455B - A kind of method for controlling yarn tension produced and control system based on FFT control algolithms - Google Patents
A kind of method for controlling yarn tension produced and control system based on FFT control algolithms Download PDFInfo
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- CN104973455B CN104973455B CN201510390262.8A CN201510390262A CN104973455B CN 104973455 B CN104973455 B CN 104973455B CN 201510390262 A CN201510390262 A CN 201510390262A CN 104973455 B CN104973455 B CN 104973455B
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Abstract
The invention discloses a kind of method for controlling yarn tension produced and control system based on FFT control algolithms,It is used as using brshless DC motor and send yarn motor,Using uncontrollable stepper motor as winding motor,Yarn motor is sent relative to the speed discrepancy of winding motor by adjusting to control the tension of yarn,Incude yarn tension using tension sensor,Tension value signal is passed to MCU control unit via the scaling of AD signal processing circuits,Include the AC signal of the direct current signal and expression traversing guide frequency that indicate target tension value size in signal,MCU controller units extract direct current signal and AC signal by fft algorithm analysis,And it is sent to brushless direct-current controller by DA signal processing circuits,And then brshless DC motor is driven by motor driving controling circuit,Direct current signal is more than target tension value,Yarn motor is sent to accelerate,Otherwise it should slow down；The positional value of AC signal is bigger, indicates that motor is in acceleration mode, otherwise is in deceleration regime.The present invention improves tension force stability.
Description
Technical field
The invention belongs to field of textile machinery, and in particular to a kind of method for controlling yarn tension produced based on FFT control algolithms
And control system.
Background technology
Yarn tension control be in textile industry one evaluation yarn manufacturing equipment yarn qualities quality important parameter it
One.During yarn winding, the size and degree of stability of tension are for the quality of yarn, molding, subsequent processing（For example it contaminates
Color etc.）Have a great impact.There is different Tensity size controls for adapting to the yarn that differential tension requires in winding process
System requires.Generally used in traditional control method is PID control.The control method has significant effect in fixed system
Fruit, but be not very significantly for time-varying, nonlinear system effect.
Therefore a kind of FFT control methods are proposed in this context.The control method is a kind of auxiliary to tension force
Algorithm is to carry out on-line tuning to tension signal.
Invention content
The present invention is directed to improve the effect of yarn manufacture and the control of collator yarn tension Control System Software, enhancing is soft
The stability and adaptability to system of part control provide a kind of method for controlling yarn tension produced based on FFT control algolithms and control
System processed.
For this purpose, the present invention uses following technical scheme：A kind of method for controlling yarn tension produced based on FFT control algolithms, is adopted
A brshless DC motor is used actively to send yarn as send yarn motor control yarn road, using a uncontrollable stepper motor conduct
Winding motor drives yarn winding, send yarn motor by adjusting relative to the speed discrepancy of winding motor and controls the tension of yarn,
Incude yarn tension using tension sensor, characterized in that the sensor feedback signal points of acquisition are set as M points, sensor
Include direct current signal and AC signal in feedback signal, direct current signal indicates that the size of target tension value, AC signal indicate volume
The frequency of traversing guide when winding yarns is extracted direct current signal in sensor feedback signal and is exchanged by fft algorithm analysis
Signal send the operating of yarn motor, direct current signal to be more than target tension value and indicate tension according to direct current signal and AC signal control
It is excessive, send yarn motor that should accelerate, on the contrary indicate that tension is too small, send yarn motor that should slow down；The positional value of AC signal is bigger, indicates
Motor is in acceleration mode, otherwise is in deceleration regime；Its analysis and Control process includes the following steps：
Step 1：Target tension value is set as Targetvalue；
Step 2：Storage acquisition A/D signal values are ADvalue；
Step 3：Sampling number N=N+1；
Step 4：Judge whether N is more than setting sampling number M, if it is lower, return to step 2；Otherwise continue step 5；
Step 5：Signal fft analysis is carried out, direct current signal is obtained and is stored as DCvalue, AC signal is stored as
ACvalue, AC signal maximum value are stored as ACvalueMAX, while storing the location information Place_ of the value
ACvalueMAX；
Step 6：Storage location difference：D-Place=Place_ACvalueMAX - LastPlace_ACvalueMAX；
Step 7：The location information of the last maximum AC signal value of storage, LastPlace_ACvalueMAX=
Place_ACvalueMAX；
Step 8：Judge the value of D-Place, if being equal to 0, goes to step 9, if it is greater than 0, go to step 10, if small
In 0, step 11 is gone to；
Step 9：Calculate DC error signal：Error=Dcvalue-Targetvalue, storage output DA signal values：
DA = DA + Error * L；
Step 10：Storage output DA signal values：DA += ACvalueMAX * k；
Step 11：Storage output DA signal values：DA -= ACvalueMAX * k；
L, K in above-mentioned steps are the numerical value less than 1 and more than 0.
A kind of yarn tension control system based on FFT control algolithms, characterized in that the yarn tension control system
Including yarn tension sensor, as brshless DC motor, man machine operation interface, MCU controller units, the AD letters for sending yarn motor
Number processing circuit, DA signal processing circuits, brushless direct current motor controller, motor driving controling circuit；Each MCU controller lists
Member all connect a TFT liquid crystal display with parameter setting module by communicating display, and multiple MCU controller units are each by CAN
Communication module is connect with the same man machine operation interface；The tension value signal that tension sensor is read is via AD signal processing circuits
Scaling be passed to MCU control unit, signal is sent by DA signal processing circuits to nothing after the processing of FFT control algolithms
Brush DC controller, and then brshless DC motor is driven by motor driving controling circuit.
As supplement to above-mentioned control system technical solution and perfect, the invention also includes following technical characteristics：
The motor driving controling circuit is MOSFET driving circuits.
The control algolithm realized in the present invention is to a compensation of traditional PID control algorithm and auxiliary.It substantially increases
The Stability and adaptability of constant tensile control.
The advantageous effect that the present invention can reach：Traditional PID control algorithm is compensated by using FFT control algolithms
And auxiliary, the stability in control and the adaptability to a variety of environment are substantially increased, to improve the steady of constant tensile control
Qualitative and adaptability.
Description of the drawings
Fig. 1 is that the method for the present invention realizes procedural block diagram.
Fig. 2 is the structure diagram of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings.
The method of the present invention using brshless DC motor as sending what yarn motor controlled yarn road actively to send yarn, using one
A uncontrollable stepper motor drives yarn winding as winding motor, send yarn motor relative to the rotating speed of winding motor by adjusting
Difference controls the tension of yarn, incudes yarn tension using tension sensor, the sensor feedback signal points of acquisition are set as M
Point, includes direct current signal and AC signal in sensor feedback signal, and direct current signal indicates the size of target tension value, exchange letter
The frequency for number indicating traversing guide when winding yarn, extracts direct current in sensor feedback signal by fft algorithm analysis and believes
Number and AC signal, send the operating of yarn motor, direct current signal to be more than target tension value according to direct current signal and AC signal control
It indicates overtension, send yarn motor that should accelerate, otherwise indicate that tension is too small, send yarn motor that should slow down；The positional value of AC signal
It is bigger, it indicates that motor is in acceleration mode, otherwise is in deceleration regime.As shown in Figure 1, the analysis and Control process of the method for the present invention
Include the following steps：
Step 1：Target tension value is set as Targetvalue；
Step 2：Storage acquisition A/D signal values are ADvalue；
Step 3：Sampling number N=N+1；
Step 4：Judge whether N is more than setting sampling number M, if it is lower, return to step 2；Otherwise continue step 5；
Step 5：Signal fft analysis is carried out, direct current signal is obtained and is stored as DCvalue, AC signal is stored as
ACvalue, AC signal maximum value are stored as ACvalueMAX, while storing the location information Place_ of the value
ACvalueMAX；
Step 6：Storage location difference：D-Place=Place_ACvalueMAX - LastPlace_ACvalueMAX；
Step 7：The location information of the last maximum AC signal value of storage, LastPlace_ACvalueMAX=
Place_ACvalueMAX；
Step 8：Judge the value of D-Place, if being equal to 0, goes to step 9, if it is greater than 0, go to step 10, if small
In 0, step 11 is gone to；
Step 9：Calculate DC error signal：Error=Dcvalue-Targetvalue, storage output DA signal values：
DA = DA + Error * L；
Step 10：Storage output DA signal values：DA += ACvalueMAX * k；
Step 11：Storage output DA signal values：DA -= ACvalueMAX * k；
L, K in above-mentioned steps are the numerical value less than 1 and more than 0, by being determined when device context is debugged.
As shown in Fig. 2, the yarn tension control system of the present invention, including yarn tension sensor, as sending yarn motor
It is brshless DC motor, man machine operation interface, MCU controller units, AD signal processing circuits, DA signal processing circuits, brushless straight
Galvanic electricity machine controller, motor driving controling circuit；Each MCU controller units are connected by communicating display with parameter setting module
A TFT liquid crystal display is connect, multiple MCU controller units are connect each by CAN communication module with the same man machine operation interface；
The tension value signal that tension sensor is read is passed to MCU control unit via the scaling of AD signal processing circuits, is controlled by FFT
Signal is sent by DA signal processing circuits to brushless direct-current controller after the processing of algorithm processed, and then passes through drive and control of electric machine
Circuit drives brshless DC motor.Motor driving controling circuit is MOSFET driving circuits.
Claims (1)
1. a kind of method for controlling yarn tension produced based on FFT control algolithms is used as using a brshless DC motor and send yarn motor
Yarn is actively sent in control yarn road, drives yarn winding as winding motor using a uncontrollable stepper motor, passes through adjusting
Yarn motor is sent relative to the speed discrepancy of winding motor to control the tension of yarn, incudes yarn tension using tension sensor,
It is characterized in that：The sensor feedback signal points of acquisition are set as M points, in sensor feedback signal comprising direct current signal with exchange
Signal, direct current signal indicate that the size of target tension value, AC signal indicate the frequency of traversing guide when winding yarn, pass through
Fft algorithm analysis extracts direct current signal and AC signal in sensor feedback signal, according to direct current signal and AC signal
Control send the operating of yarn motor, direct current signal to be more than target tension value and indicate overtension, send yarn motor that should accelerate, otherwise indicates
Tension is too small, send yarn motor that should slow down；The positional value of AC signal is bigger, indicates that motor is in acceleration mode, otherwise is in and subtracts
Fast state；Its analysis and Control process includes the following steps：
Step 1：Target tension value is set as Targetvalue；
Step 2：Storage acquisition A/D signal values are ADvalue；
Step 3：Sampling number N=N+1；
Step 4：Judge whether N is more than setting sampling number M, if it is lower, return to step 2；Otherwise continue step 5；
Step 5：Signal fft analysis is carried out, direct current signal is obtained and is stored as DCvalue, AC signal is stored as ACvalue, hands over
Stream signal maximum is stored as ACvalueMAX, while storing the location information Place_ACvalueMAX of the value；
Step 6：Storage location difference：D-Place=Place_ACvalueMAX - LastPlace_ACvalueMAX；
Step 7：The location information of the last maximum AC signal value of storage, LastPlace_ACvalueMAX=Place_
ACvalueMAX；
Step 8：Judge the value of D-Place, if being equal to 0, goes to step 9, if it is greater than 0, go to step 10, if it is less than 0,
Go to step 11；
Step 9：Calculate DC error signal：Error=Dcvalue-Targetvalue, storage output DA signal values：DA =
DA + Error * L；
Step 10：Storage output DA signal values：DA += ACvalueMAX * k；
Step 11：Storage output DA signal values：DA -= ACvalueMAX * k；
L, K in above-mentioned steps are the numerical value less than 1 and more than 0.
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| CN109335867B (en) * | 2018-10-12 | 2019-07-16 | 常州市新创智能科技有限公司 | A kind of method for controlling yarn tension produced adjusted based on motor Trigger Angle |
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| JPS6312571A (en) * | 1986-06-30 | 1988-01-19 | Shinko Electric Co Ltd | Tension control device |
| KR20110109217A (en) * | 2010-03-30 | 2011-10-06 | 주식회사 포스코건설 | Method for measuring tension of cable, media that program executing the method is recorded, analyzing device that the program is installed |
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|---|---|---|---|---|
| US4966333A (en) * | 1987-10-12 | 1990-10-30 | Gebruder Sucker & Franz Muller Gmbh & Co. | Method of controlling tension in a yarn sheet during winding |
| CN101334325A (en) * | 2008-08-05 | 2008-12-31 | 南京博斯威尔电气有限公司 | Cable force vibration detection method and its detecting apparatus |
| CN101602449A (en) * | 2009-06-17 | 2009-12-16 | 山东同济机电有限公司 | Online detection of yarn tension and real-time control apparatus |
| CN101673119A (en) * | 2009-10-12 | 2010-03-17 | 天津工业大学 | Method for controlling tension stability of wrap yarn during wrap feeding and rolling process of loom |
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Denomination of invention: Method and system for yarn tension control based on FFT control algorithm Effective date of registration: 20191212 Granted publication date: 20180918 Pledgee: Bank of China, Limited by Share Ltd, Xinchang branch Pledgor: Zhengjiang Kangli Automatic Control Technology Co., Ltd. Registration number: Y2019330000305 |
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Date of cancellation: 20200927 Granted publication date: 20180918 Pledgee: Bank of China Limited by Share Ltd. Xinchang branch Pledgor: ZHEJIANG KANGLI AUTOMATIC CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2019330000305 |
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Denomination of invention: A yarn tension control method and control system based on FFT control algorithm Effective date of registration: 20200928 Granted publication date: 20180918 Pledgee: Bank of China Limited by Share Ltd. Xinchang branch Pledgor: ZHEJIANG KANGLI AUTOMATIC CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020330000778 |
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Date of cancellation: 20210625 Granted publication date: 20180918 Pledgee: Bank of China Limited by Share Ltd. Xinchang branch Pledgor: ZHEJIANG KANGLI AUTOMATIC CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2020330000778 |
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Denomination of invention: A yarn tension control method and control system based on FFT control algorithm Effective date of registration: 20210629 Granted publication date: 20180918 Pledgee: Bank of China Limited by Share Ltd. Xinchang branch Pledgor: ZHEJIANG KANGLI AUTOMATIC CONTROL TECHNOLOGY Co.,Ltd. Registration number: Y2021330000720 |
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